Fair Value Measurement, Estimated Fair Values of Financial Instruments (Details) (USD $) In Thousands, unless otherwise specified	Jun. 30, 2014	Dec. 31, 2013
Financial assets [Abstract]
Securities available for sale	$ 57,742	$ 53,571
Quoted Prices in Active Markets for Identical Assets (Level 1) [Member]
Financial assets [Abstract]
Cash and short-term investments	58,940	71,197
Securities available for sale	360	349
Restricted investments	0	0
Net Loans	0	0
Accrued interest receivable	0	0
Interest rate swaps	0	0
BOLI	0	0
Total assets at fair value	59,300	71,546
Liabilities [Abstract]
Deposits	0	0
Borrowings	0	0
Company obligated mandatorily redeemable capital securities		0
Accrued interest payable	0	0
Interest rate swaps	0	0
Total liabilities at fair value	0	0
Significant Other Observable Inputs (Level 2) [Member]
Financial assets [Abstract]
Cash and short-term investments	0	0
Securities available for sale	57,382	53,222
Restricted investments	1,294	1,462
Net Loans	433,979	444,587
Accrued interest receivable	1,544	1,568
Interest rate swaps	36	96
BOLI	12,624	12,433
Total assets at fair value	506,859	513,368
Liabilities [Abstract]
Deposits	523,800	541,496
Borrowings	13,104	12,833
Company obligated mandatorily redeemable capital securities	4,117	4,117
Accrued interest payable	215	219
Interest rate swaps	387	223
Total liabilities at fair value	541,623	558,888
Significant Other Unobservable Inputs (Level 3) [Member]
Financial assets [Abstract]
Cash and short-term investments	0	0
Securities available for sale	0	0
Restricted investments	0	0
Net Loans	102	163
Accrued interest receivable	0	0
Interest rate swaps	0	0
BOLI	0	0
Total assets at fair value	102	163
Liabilities [Abstract]
Deposits	0	0
Borrowings	0	0
Company obligated mandatorily redeemable capital securities		0
Accrued interest payable	0	0
Interest rate swaps	0	0
Total liabilities at fair value	0	0
Carrying Amount [Member]
Financial assets [Abstract]
Cash and short-term investments	58,877	71,126
Securities available for sale	57,742	53,571
Restricted investments	1,294	1,462
Net Loans	436,552	444,710
Accrued interest receivable	1,544	1,568
Interest rate swaps	36	96
BOLI	12,624	12,433
Total assets at fair value	568,669	584,966
Liabilities [Abstract]
Deposits	522,750	540,204
Borrowings	13,107	13,139
Company obligated mandatorily redeemable capital securities	4,124	4,124
Accrued interest payable	215	219
Interest rate swaps	387	223
Total liabilities at fair value	540,583	557,909
Fair Value [Member]
Financial assets [Abstract]
Cash and short-term investments	58,940	71,197
Securities available for sale	57,742	53,571
Restricted investments	1,294	1,462
Net Loans	434,081	444,750
Accrued interest receivable	1,544	1,568
Interest rate swaps	36	96
BOLI	12,624	12,433
Total assets at fair value	566,261	585,077
Liabilities [Abstract]
Deposits	523,800	541,496
Borrowings	13,104	12,833
Company obligated mandatorily redeemable capital securities	4,117	4,117
Accrued interest payable	215	219
Interest rate swaps	387	223
Total liabilities at fair value	$ 541,623	$ 558,888